Indexing all matchers

compiler.go

@@ -48,11 +48,13 @@ func optimize(matcher match.Matcher) match.Matcher {
 		}
 
 		if leftNil && rightSuffix {
-			return match.Every{match.Matchers{match.Prefix{r.Str}, rs}}
+			return match.PrefixSuffix{Prefix: r.Str, Suffix: rs.Suffix}
+			//			return match.EveryOf{match.Matchers{match.Prefix{r.Str}, rs}}
 		}
 
 		if rightNil && leftPrefix {
-			return match.Every{match.Matchers{lp, match.Suffix{r.Str}}}
+			return match.PrefixSuffix{Prefix: lp.Prefix, Suffix: r.Str}
+			//			return match.EveryOf{match.Matchers{lp, match.Suffix{r.Str}}}
 		}
 
 		return m
@@ -176,7 +178,7 @@ func glueAsEvery(matchers []match.Matcher) match.Matcher {
 		return match.Min{min}
 	}
 
-	every := match.Every{}
+	every := match.EveryOf{}
 
 	if min > 0 {
 		every.Add(match.Min{min})
@@ -220,23 +222,21 @@ func compileMatchers(matchers []match.Matcher) (match.Matcher, error) {
 	}
 
 	var (
-		val match.Primitive
+		val match.Matcher
 		idx int
 	)
 	maxLen := -1
 	for i, matcher := range matchers {
-		if p, ok := matcher.(match.Primitive); ok {
-			l := p.Len()
-			if l >= maxLen {
-				maxLen = l
-				idx = i
-				val = p
-			}
+		l := matcher.Len()
+		if l >= maxLen {
+			maxLen = l
+			idx = i
+			val = matcher
 		}
 	}
 
 	if val == nil {
-		return nil, fmt.Errorf("could not convert matchers %s: need at least one primitive", match.Matchers(matchers))
+		return nil, fmt.Errorf("could not convert matchers %s: need at least one matcher", match.Matchers(matchers))
 	}
 
 	left := matchers[:idx]

compiler_test.go

@@ -25,7 +25,7 @@ func TestGlueMatchers(t *testing.T) {
 				match.Any{separators},
 				match.Single{separators},
 			},
-			match.Every{match.Matchers{
+			match.EveryOf{match.Matchers{
 				match.Min{1},
 				match.Contains{separators, true},
 			}},
@@ -36,7 +36,7 @@ func TestGlueMatchers(t *testing.T) {
 				match.Single{},
 				match.Single{},
 			},
-			match.Every{match.Matchers{
+			match.EveryOf{match.Matchers{
 				match.Min{3},
 				match.Max{3},
 			}},
@@ -46,7 +46,7 @@ func TestGlueMatchers(t *testing.T) {
 				match.List{"a", true},
 				match.Any{"a"},
 			},
-			match.Every{match.Matchers{
+			match.EveryOf{match.Matchers{
 				match.Min{1},
 				match.Contains{"a", true},
 			}},
@@ -236,7 +236,7 @@ func TestCompiler(t *testing.T) {
 		{
 			ast: pattern(&nodeAny{}, &nodeSingle{}, &nodeSingle{}, &nodeSingle{}),
 			sep: separators,
-			result: match.Every{Matchers: match.Matchers{
+			result: match.EveryOf{Matchers: match.Matchers{
 				match.Min{3},
 				match.Contains{separators, true},
 			}},
@@ -277,8 +277,9 @@ func TestCompiler(t *testing.T) {
 			result: match.Prefix{"abc"},
 		},
 		{
-			ast:    pattern(&nodeText{text: "abc"}, &nodeAny{}, &nodeText{text: "def"}),
-			result: match.Every{match.Matchers{match.Prefix{"abc"}, match.Suffix{"def"}}},
+			ast: pattern(&nodeText{text: "abc"}, &nodeAny{}, &nodeText{text: "def"}),
+			//			result: match.EveryOf{match.Matchers{match.Prefix{"abc"}, match.Suffix{"def"}}},
+			result: match.PrefixSuffix{"abc", "def"},
 		},
 		{
 			ast:    pattern(&nodeAny{}, &nodeAny{}, &nodeAny{}, &nodeText{text: "abc"}, &nodeAny{}, &nodeAny{}),

glob_test.go

@@ -42,7 +42,7 @@ func TestCompilePattern(t *testing.T) {
 		exp     match.Matcher
 	}{
 	//		{
-	//			pattern: "{abc,def}ghi",
+	//			pattern: "{*,def}ghi",
 	//			exp:     match.Raw{"t"},
 	//		},
 	} {

match/any.go

@@ -3,6 +3,7 @@ package match
 import (
 	"fmt"
 	"strings"
+	"unicode/utf8"
 )
 
 type Any struct {
@@ -13,20 +14,25 @@ func (self Any) Match(s string) bool {
 	return strings.IndexAny(s, self.Separators) == -1
 }
 
-func (self Any) Index(s string) (index int, segments []int) {
-	index = -1
-	for i, r := range s {
-		if strings.IndexRune(self.Separators, r) == -1 {
-			if index == -1 {
-				index = i
-			}
-			segments = append(segments, i-index)
-		} else if index != -1 {
-			break
-		}
+func (self Any) Index(s string) (int, []int) {
+	var sub string
+
+	found := strings.IndexAny(s, self.Separators)
+	switch found {
+	case -1:
+		sub = s
+	default:
+		sub = s[:found]
 	}
 
-	return
+	segments := make([]int, 0, utf8.RuneCountInString(sub)+1)
+	for i := range sub {
+		segments = append(segments, i)
+	}
+
+	segments = append(segments, len(sub))
+
+	return 0, segments
 }
 
 func (self Any) Len() int {

match/any_of.go

@@ -23,9 +23,40 @@ func (self AnyOf) Match(s string) bool {
 	return false
 }
 
-//func (self AnyOf) Index(s string) (index int, segments []int) {
-//
-//}
+func (self AnyOf) Index(s string) (int, []int) {
+	if len(self.Matchers) == 0 {
+		return -1, nil
+	}
+
+	// segments to merge
+	var segments [][]int
+	index := -1
+
+	for _, m := range self.Matchers {
+		idx, seg := m.Index(s)
+		if idx == -1 {
+			continue
+		}
+
+		if index == -1 || idx < index {
+			index = idx
+			segments = [][]int{seg}
+			continue
+		}
+
+		if idx > index {
+			continue
+		}
+
+		segments = append(segments, seg)
+	}
+
+	if index == -1 {
+		return -1, nil
+	}
+
+	return index, mergeSegments(segments)
+}
 
 func (self AnyOf) Len() (l int) {
 	l = -1

match/any_of_test.go

@@ -0,0 +1,53 @@
+package match
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestAnyOfIndex(t *testing.T) {
+	for id, test := range []struct {
+		matchers Matchers
+		fixture  string
+		index    int
+		segments []int
+	}{
+		{
+			Matchers{
+				Any{},
+				Raw{"b"},
+				Raw{"c"},
+			},
+			"abc",
+			0,
+			[]int{0, 1, 2, 3},
+		},
+		{
+			Matchers{
+				Prefix{"b"},
+				Suffix{"c"},
+			},
+			"abc",
+			0,
+			[]int{3},
+		},
+		{
+			Matchers{
+				List{"[def]", false},
+				List{"[abc]", false},
+			},
+			"abcdef",
+			0,
+			[]int{1},
+		},
+	} {
+		everyOf := AnyOf{test.matchers}
+		index, segments := everyOf.Index(test.fixture)
+		if index != test.index {
+			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
+		}
+		if !reflect.DeepEqual(segments, test.segments) {
+			t.Errorf("#%d unexpected segments: exp: %v, act: %v", id, test.segments, segments)
+		}
+	}
+}

match/btree.go

@@ -6,8 +6,7 @@ import (
 )
 
 type BTree struct {
-	Value       Primitive
-	Left, Right Matcher
+	Value, Left, Right Matcher
 }
 
 func (self BTree) Kind() Kind {
@@ -39,6 +38,11 @@ func (self BTree) Len() int {
 	return -1
 }
 
+// todo
+func (self BTree) Index(s string) (int, []int) {
+	return -1, nil
+}
+
 func (self BTree) Match(s string) bool {
 	inputLen := len(s)
 

match/contains.go

@@ -3,6 +3,7 @@ package match
 import (
 	"fmt"
 	"strings"
+	"unicode/utf8"
 )
 
 type Contains struct {
@@ -14,6 +15,43 @@ func (self Contains) Match(s string) bool {
 	return strings.Contains(s, self.Needle) != self.Not
 }
 
+func (self Contains) Index(s string) (int, []int) {
+	var (
+		sub    string
+		offset int
+	)
+
+	idx := strings.Index(s, self.Needle)
+
+	if !self.Not {
+		if idx == -1 {
+			return -1, nil
+		}
+
+		offset = idx + len(self.Needle)
+
+		if len(s) <= offset {
+			return 0, []int{offset}
+		}
+
+		sub = s[offset:]
+	} else {
+		switch idx {
+		case -1:
+			sub = s
+		default:
+			sub = s[:idx]
+		}
+	}
+
+	segments := make([]int, 0, utf8.RuneCountInString(sub)+1)
+	for i, _ := range sub {
+		segments = append(segments, offset+i)
+	}
+
+	return 0, append(segments, offset+len(sub))
+}
+
 func (self Contains) Len() int {
 	return -1
 }

match/contains_test.go

@@ -0,0 +1,54 @@
+package match
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestContainsIndex(t *testing.T) {
+	for id, test := range []struct {
+		prefix   string
+		not      bool
+		fixture  string
+		index    int
+		segments []int
+	}{
+		{
+			"ab",
+			false,
+			"abc",
+			0,
+			[]int{2, 3},
+		},
+		{
+			"ab",
+			false,
+			"fffabfff",
+			0,
+			[]int{5, 6, 7, 8},
+		},
+		{
+			"ab",
+			true,
+			"abc",
+			0,
+			[]int{0},
+		},
+		{
+			"ab",
+			true,
+			"fffabfff",
+			0,
+			[]int{0, 1, 2, 3},
+		},
+	} {
+		p := Contains{test.prefix, test.not}
+		index, segments := p.Index(test.fixture)
+		if index != test.index {
+			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
+		}
+		if !reflect.DeepEqual(segments, test.segments) {
+			t.Errorf("#%d unexpected segments: exp: %v, act: %v", id, test.segments, segments)
+		}
+	}
+}

match/every_of.go

@@ -4,16 +4,16 @@ import (
 	"fmt"
 )
 
-type Every struct {
+type EveryOf struct {
 	Matchers Matchers
 }
 
-func (self *Every) Add(m Matcher) error {
+func (self *EveryOf) Add(m Matcher) error {
 	self.Matchers = append(self.Matchers, m)
 	return nil
 }
 
-func (self Every) Len() (l int) {
+func (self EveryOf) Len() (l int) {
 	for _, m := range self.Matchers {
 		if ml := m.Len(); l > 0 {
 			l += ml
@@ -25,7 +25,46 @@ func (self Every) Len() (l int) {
 	return
 }
 
-func (self Every) Match(s string) bool {
+func (self EveryOf) Index(s string) (int, []int) {
+	var index int
+	var offset int
+	var segments []int
+
+	sub := s
+	for _, m := range self.Matchers {
+		idx, seg := m.Index(sub)
+		if idx == -1 {
+			return -1, nil
+		}
+
+		var sum []int
+		if segments == nil {
+			sum = seg
+		} else {
+			delta := index - (idx + offset)
+			for _, ex := range segments {
+				for _, n := range seg {
+					if ex+delta == n {
+						sum = append(sum, n)
+					}
+				}
+			}
+		}
+
+		if len(sum) == 0 {
+			return -1, nil
+		}
+
+		segments = sum
+		index = idx + offset
+		sub = s[index:]
+		offset += idx
+	}
+
+	return index, segments
+}
+
+func (self EveryOf) Match(s string) bool {
 	for _, m := range self.Matchers {
 		if !m.Match(s) {
 			return false
@@ -35,10 +74,10 @@ func (self Every) Match(s string) bool {
 	return true
 }
 
-func (self Every) Kind() Kind {
+func (self EveryOf) Kind() Kind {
 	return KindEveryOf
 }
 
-func (self Every) String() string {
+func (self EveryOf) String() string {
 	return fmt.Sprintf("[every_of:%s]", self.Matchers)
 }

match/every_of_test.go

@@ -0,0 +1,45 @@
+package match
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestEveryOfIndex(t *testing.T) {
+	for id, test := range []struct {
+		matchers Matchers
+		fixture  string
+		index    int
+		segments []int
+	}{
+		{
+			Matchers{
+				Any{},
+				Raw{"b"},
+				Raw{"c"},
+			},
+			"abc",
+			-1,
+			nil,
+		},
+		{
+			Matchers{
+				Any{},
+				Prefix{"b"},
+				Suffix{"c"},
+			},
+			"abc",
+			1,
+			[]int{2},
+		},
+	} {
+		everyOf := EveryOf{test.matchers}
+		index, segments := everyOf.Index(test.fixture)
+		if index != test.index {
+			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
+		}
+		if !reflect.DeepEqual(segments, test.segments) {
+			t.Errorf("#%d unexpected segments: exp: %v, act: %v", id, test.segments, segments)
+		}
+	}
+}

match/list_test.go

@@ -0,0 +1,40 @@
+package match
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestListIndex(t *testing.T) {
+	for id, test := range []struct {
+		list     string
+		not      bool
+		fixture  string
+		index    int
+		segments []int
+	}{
+		{
+			"ab",
+			false,
+			"abc",
+			0,
+			[]int{1},
+		},
+		{
+			"ab",
+			true,
+			"fffabfff",
+			0,
+			[]int{1},
+		},
+	} {
+		p := List{test.list, test.not}
+		index, segments := p.Index(test.fixture)
+		if index != test.index {
+			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
+		}
+		if !reflect.DeepEqual(segments, test.segments) {
+			t.Errorf("#%d unexpected segments: exp: %v, act: %v", id, test.segments, segments)
+		}
+	}
+}

match/match.go

@@ -29,12 +29,8 @@ const (
 
 type Matcher interface {
 	Match(string) bool
-	Len() int
-}
-
-type Primitive interface {
-	Matcher
 	Index(string) (int, []int)
+	Len() int
 }
 
 type Matchers []Matcher
@@ -47,3 +43,60 @@ func (m Matchers) String() string {
 
 	return fmt.Sprintf("matchers[%s]", strings.Join(s, ","))
 }
+
+func appendIfNotAsPrevious(target []int, val int) []int {
+	l := len(target)
+	if l != 0 && target[l-1] == val {
+		return target
+	}
+
+	return append(target, val)
+}
+
+// mergeSegments merges and sorts given already SORTED and UNIQUE segments.
+func mergeSegments(segments [][]int) []int {
+	var current []int
+	for _, s := range segments {
+		if current == nil {
+			current = s
+			continue
+		}
+
+		var next []int
+		for x, y := 0, 0; x < len(current) || y < len(s); {
+			if x >= len(current) {
+				next = append(next, s[y:]...)
+				break
+			}
+
+			if y >= len(s) {
+				next = append(next, current[x:]...)
+				break
+			}
+
+			xValue := current[x]
+			yValue := s[y]
+
+			switch {
+
+			case xValue == yValue:
+				x++
+				y++
+				next = appendIfNotAsPrevious(next, xValue)
+
+			case xValue < yValue:
+				next = appendIfNotAsPrevious(next, xValue)
+				x++
+
+			case yValue < xValue:
+				next = appendIfNotAsPrevious(next, yValue)
+				y++
+
+			}
+		}
+
+		current = next
+	}
+
+	return current
+}

match/match_test.go

@@ -0,0 +1,37 @@
+package match
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestMergeSegments(t *testing.T) {
+	for id, test := range []struct {
+		segments [][]int
+		exp      []int
+	}{
+		{
+			[][]int{
+				[]int{0, 6, 7},
+				[]int{0, 1, 3},
+				[]int{2, 4},
+			},
+			[]int{0, 1, 2, 3, 4, 6, 7},
+		},
+		{
+			[][]int{
+				[]int{0, 1, 3, 6, 7},
+				[]int{0, 1, 3},
+				[]int{2, 4},
+				[]int{1},
+			},
+			[]int{0, 1, 2, 3, 4, 6, 7},
+		},
+	} {
+		act := mergeSegments(test.segments)
+		if !reflect.DeepEqual(act, test.exp) {
+			t.Errorf("#%d merge sort segments unexpected:\nact: %v\nexp:%v", id, act, test.exp)
+			continue
+		}
+	}
+}

match/max.go

@@ -13,6 +13,26 @@ func (self Max) Match(s string) bool {
 	return utf8.RuneCountInString(s) <= self.Limit
 }
 
+func (self Max) Index(s string) (int, []int) {
+	c := utf8.RuneCountInString(s)
+	if c < self.Limit {
+		return -1, nil
+	}
+
+	segments := make([]int, 0, self.Limit+1)
+	segments = append(segments, 0)
+	var count int
+	for i, r := range s {
+		count++
+		if count > self.Limit {
+			break
+		}
+		segments = append(segments, i+utf8.RuneLen(r))
+	}
+
+	return 0, segments
+}
+
 func (self Max) Len() int {
 	return -1
 }

match/max_test.go

@@ -0,0 +1,37 @@
+package match
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestMaxIndex(t *testing.T) {
+	for id, test := range []struct {
+		limit    int
+		fixture  string
+		index    int
+		segments []int
+	}{
+		{
+			3,
+			"abc",
+			0,
+			[]int{0, 1, 2, 3},
+		},
+		{
+			3,
+			"abcdef",
+			0,
+			[]int{0, 1, 2, 3},
+		},
+	} {
+		p := Max{test.limit}
+		index, segments := p.Index(test.fixture)
+		if index != test.index {
+			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
+		}
+		if !reflect.DeepEqual(segments, test.segments) {
+			t.Errorf("#%d unexpected segments: exp: %v, act: %v", id, test.segments, segments)
+		}
+	}
+}

match/min.go

@@ -13,6 +13,25 @@ func (self Min) Match(s string) bool {
 	return utf8.RuneCountInString(s) >= self.Limit
 }
 
+func (self Min) Index(s string) (int, []int) {
+	var count int
+
+	c := utf8.RuneCountInString(s)
+	if c < self.Limit {
+		return -1, nil
+	}
+
+	segments := make([]int, 0, c-self.Limit+1)
+	for i, r := range s {
+		count++
+		if count >= self.Limit {
+			segments = append(segments, i+utf8.RuneLen(r))
+		}
+	}
+
+	return 0, segments
+}
+
 func (self Min) Len() int {
 	return -1
 }

match/min_test.go

@@ -0,0 +1,37 @@
+package match
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestMinIndex(t *testing.T) {
+	for id, test := range []struct {
+		limit    int
+		fixture  string
+		index    int
+		segments []int
+	}{
+		{
+			1,
+			"abc",
+			0,
+			[]int{1, 2, 3},
+		},
+		{
+			3,
+			"abcd",
+			0,
+			[]int{3, 4},
+		},
+	} {
+		p := Min{test.limit}
+		index, segments := p.Index(test.fixture)
+		if index != test.index {
+			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
+		}
+		if !reflect.DeepEqual(segments, test.segments) {
+			t.Errorf("#%d unexpected segments: exp: %v, act: %v", id, test.segments, segments)
+		}
+	}
+}

match/prefix.go

@@ -3,6 +3,7 @@ package match
 import (
 	"fmt"
 	"strings"
+	"unicode/utf8"
 )
 
 type Prefix struct {
@@ -13,6 +14,29 @@ func (self Prefix) Kind() Kind {
 	return KindPrefix
 }
 
+func (self Prefix) Index(s string) (int, []int) {
+	idx := strings.Index(s, self.Prefix)
+	if idx == -1 {
+		return -1, nil
+	}
+
+	length := len(self.Prefix)
+	var sub string
+	if len(s) > idx+length {
+		sub = s[idx+length:]
+	} else {
+		sub = ""
+	}
+
+	segments := make([]int, 0, utf8.RuneCountInString(sub)+1)
+	segments = append(segments, length)
+	for i, r := range sub {
+		segments = append(segments, length+i+utf8.RuneLen(r))
+	}
+
+	return idx, segments
+}
+
 func (self Prefix) Len() int {
 	return -1
 }

match/prefix_suffix.go

@@ -13,6 +13,36 @@ func (self PrefixSuffix) Kind() Kind {
 	return KindPrefixSuffix
 }
 
+func (self PrefixSuffix) Index(s string) (int, []int) {
+	prefixIdx := strings.Index(s, self.Prefix)
+	if prefixIdx == -1 {
+		return -1, nil
+	}
+
+	var segments []int
+	for sub := s[prefixIdx:]; ; {
+		suffixIdx := strings.LastIndex(sub, self.Suffix)
+		if suffixIdx == -1 {
+			break
+		}
+
+		segments = append(segments, suffixIdx+len(self.Suffix))
+		sub = s[:suffixIdx]
+	}
+
+	segLen := len(segments)
+	if segLen == 0 {
+		return -1, nil
+	}
+
+	resp := make([]int, segLen)
+	for i, s := range segments {
+		resp[segLen-i-1] = s
+	}
+
+	return prefixIdx, resp
+}
+
 func (self PrefixSuffix) Len() int {
 	return -1
 }

match/prefix_suffix_test.go

@@ -0,0 +1,47 @@
+package match
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestPrefixSuffixIndex(t *testing.T) {
+	for id, test := range []struct {
+		prefix   string
+		suffix   string
+		fixture  string
+		index    int
+		segments []int
+	}{
+		{
+			"a",
+			"c",
+			"abc",
+			0,
+			[]int{3},
+		},
+		{
+			"f",
+			"f",
+			"fffabfff",
+			0,
+			[]int{1, 2, 3, 6, 7, 8},
+		},
+		{
+			"ab",
+			"bc",
+			"abc",
+			0,
+			[]int{3},
+		},
+	} {
+		p := PrefixSuffix{test.prefix, test.suffix}
+		index, segments := p.Index(test.fixture)
+		if index != test.index {
+			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
+		}
+		if !reflect.DeepEqual(segments, test.segments) {
+			t.Errorf("#%d unexpected segments: exp: %v, act: %v", id, test.segments, segments)
+		}
+	}
+}

match/prefix_test.go

@@ -0,0 +1,37 @@
+package match
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestPrefixIndex(t *testing.T) {
+	for id, test := range []struct {
+		prefix   string
+		fixture  string
+		index    int
+		segments []int
+	}{
+		{
+			"ab",
+			"abc",
+			0,
+			[]int{2, 3},
+		},
+		{
+			"ab",
+			"fffabfff",
+			3,
+			[]int{2, 3, 4, 5},
+		},
+	} {
+		p := Prefix{test.prefix}
+		index, segments := p.Index(test.fixture)
+		if index != test.index {
+			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
+		}
+		if !reflect.DeepEqual(segments, test.segments) {
+			t.Errorf("#%d unexpected segments: exp: %v, act: %v", id, test.segments, segments)
+		}
+	}
+}

match/suffix.go

@@ -13,6 +13,15 @@ func (self Suffix) Kind() Kind {
 	return KindSuffix
 }
 
+func (self Suffix) Index(s string) (int, []int) {
+	idx := strings.Index(s, self.Suffix)
+	if idx == -1 {
+		return -1, nil
+	}
+
+	return 0, []int{idx + len(self.Suffix)}
+}
+
 func (self Suffix) Len() int {
 	return -1
 }

match/suffix_test.go

@@ -0,0 +1,37 @@
+package match
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestSuffixIndex(t *testing.T) {
+	for id, test := range []struct {
+		prefix   string
+		fixture  string
+		index    int
+		segments []int
+	}{
+		{
+			"ab",
+			"abc",
+			0,
+			[]int{2},
+		},
+		{
+			"ab",
+			"fffabfff",
+			0,
+			[]int{5},
+		},
+	} {
+		p := Suffix{test.prefix}
+		index, segments := p.Index(test.fixture)
+		if index != test.index {
+			t.Errorf("#%d unexpected index: exp: %d, act: %d", id, test.index, index)
+		}
+		if !reflect.DeepEqual(segments, test.segments) {
+			t.Errorf("#%d unexpected segments: exp: %v, act: %v", id, test.segments, segments)
+		}
+	}
+}

match/super.go

@@ -16,7 +16,7 @@ func (self Super) Len() int {
 }
 
 func (self Super) Index(s string) (int, []int) {
-	segments := make([]int, utf8.RuneCountInString(s))
+	segments := make([]int, 0, utf8.RuneCountInString(s)+1)
 	for i := range s {
 		segments = append(segments, i)
 	}